Telephone-exchange system.



w. w. CARPENTER.

TELEPHONE EXCHANGE SYSTEM.

APPLICATION FILED DEC. 30- 1916.

1 24mm. Patented Nov. 20, 191?.

2 SHEETS-SHEET I.

W. W. CARPENTER.

TELEPHONE EXCHANGE SYSTEM. APPLICATION FILED 05c. 30. 1916.

1 34%? 1 Patented Nov. 20, 1917.

2 SHEETS-SHEET 2.

Wann r. creatur s, orisnwaaanew JERSEY. lasslenon r0 wnsrnnn nric- TRICcoMrANY;INooR1=onArnn, OE1NEWYORK,N:Y1, a conronsrron orn'nw YORK.

To all who; twtay concern.

Be it known that I, WARREN W. CAR E' TER, a citizen of the Unite'dStates, residing at Newark, in the county of Essen and State of NewJersevfhave inventedcertain new .9. a and useful Improvements 1nTelephone EX- change Systems, of which the'followin'g is a full, clear,concise, and exact description.

This invention relates to telep lione eX-' change systems employing{automatic switches, and more particularly to control circuits forgoverning the operation of such switches. p

It is the object of this invention to provide a simple method ofcontrolling switches which operate reverse iinpulsesenders in responseto their movement.

In a well-known type of sender, a set of counting relays is actuated inresponse to the movement of the switch controlled by them, these relaysbeing successively energized by the action of a steppin relay. In theusual a rrangement of this type of sender, the stepping relay isenergized anddeener gized for each step made by the switch underoperation. I H 1 A feature of the present invention is an arrangement bywhich a stepping relay is energized during one step of the switch be ingoperated and is dee'nergized during the neXt step of the switch beingoperated. As

a result of this operation less counting relays may be employed and theoperation is simpler and more accurate. H

An additional feature of this invention is a counting relay arrangementin which one of the relays in the set. is not energiZed" when evennumbers are being sent, but is energized when odd numbers are beingsent, therefore, operation of the chain of counting relay my Start witha desired relay the chain and avarying number of impulses will be sent,dependent upon whether the number to be sent is odd or even.

It is thought that the invention will best be understood from thefollowing detailed description, reference being had to the ac companyingdrawings.

In the drawings, Figure 1 shows a selector switch having features inaccordance with the present invention; and Fig. 2 shows a senderincluding a set of counting relays and a control switch therefor,together with a pair of registers to control such sender.

The general structure and operation of TELEPHONE-EXCHANGE srsrsn.

sp'ecificatidn of Letters Patent. Pat t d N 2 0, 191W, r limitationfiiea'nec'ember 30,1916. Serial to; 139,896,

the switch shown in Fig. 1 is broadly similar to that shown in PatentNo. 1,168,319, to A, E. Lundell, differing only in the construction ofthe commutator. The construction of the commutator used in the presentcasewill be described hereinafter. The sequence switches and registersare of a type similar to those disclosed inthe above mentioned patent.

The operation 1 of the system is as; follows. An operator, one of whosecord circuits is indicated at 0, may plug into a callmg line jack 1 inresponseto any wellknown line signal. The insertion of plug Qinto jack 1completes a circuit for cord relay 3 from grounded battery connected tothe sleeve of jack 1, through the windings of a cut-off relay, sleeve ofplug 2, winding of relay 3 to ground. It has not been consid erednecessary to disclose the cut-off relay of the calling line, since thisis an arrange ment-well-known in the art. The energization of relay 3completes a circuit from grounded battery, power magnet of sequenceswitch 100, contact 102, armature and front contact of relay 3 toground, which moves sequenceswitch 100" from position 1 to position 2under the control of its normal spring 101.

,After plugging in, the operator will dopress listening key 41, therebyconnecting her head set into circuit with the calling subscriber. Shemay then converse with the calling subscriberand be informed of thenumber of the wanted line. Assuming that the called subscriber may bereached through ,an office, the trunks leading to which terminate in thesecond sub-group of the fifth main group of trunks served by the switchshown in Fig. 1, the operator will depress office key 5 and digit keysin accordance with the designation of the wanted line. Since, however,we are not concerned with the operation of succeeding switches, thesekeys have not been shown.

A circuit is now completed for relay 6 from grounded battery, winding ofrelay 6, closed right-hand contacts of key 5 to ground. Relay 6isenergized and completes a circuit from grounded battery, power magnetof district brush register sequence switch 300,right-hand armature andcontact of relay 7 armature and contact of relay 6 to ground. A parallelcircuit is completed from grounded battery. power magnet its normalcontact 201.

of district group'register sequence switch 400, right-hand armature andcontact of relay 8, armature and contact of relay 6 to ground. Registers300 and 400are moved out of the positions in which they last came torest and continue to rotate until they arrive in positions determined bythe contacts controlled by key 5. brush register 300 arrives in position4, a circuit is completed from grounded battery, winding of relay .7,contact 301, closed lefthand. contacts of key 5 toground. Relay 7 isenergized, breaking the circuit of power magnet of brush register 300and the register is brought to rest in position 4. When district groupregister 400 arrives in position 1, a circuit is completed from groundedbattery, winding of relay 8, contact 401 closed right-hand contacts ofkey 5, to ground. Relay 8 is energized and breaks at its right-handarmature the circuit of the power magnet of register 400, which is thenbrought to rest in position 1. Similar registers, not shown, arecontrolled by the digit keys. After all the registers have been p0:sitioned a circuit is completed from ground ed battery, winding of powermagnet of sequenceswitch 200, contact 202, left-hand armature and frontcontact of relay 7, lefthand armature'and frontcontact of relay 8,through the left hand armatures and front contacts of registercontrolling relays corresponding to relays and 8 to ground, for movingsequence switch 200 out of position 1 and into position 2 under thecontrol of With sequence switch 100 in position 2 and sequence switch200 in position 2, a circuit is completed from' grounded battery,winding of stepping relay 9, contact 203, conductor 10, contact 103,winding of relay 1'1, conductor 12, contact 204. outer armature and backcontact of the 0 counting relayto ground. V

The energization ofirelay 11 completes a 'circuit from grounded battery,winding of relay 14, left-hand armature and front con tact of relay 11to ground. Relay 14 is energized in this circuit and completes a circuitfrom grounded battery, power magnet of sequence switch 100, contact 104,left-' hand armature and front contact of relay 14 to ground, whichmoves sequence switch 100 out of position 2 and into position 3.

Inposition 3 of sequence switch 100, a circuit is completed fromgrounded battery, winding of power magnet 18, sequence switch contact105, left-hand armature and front contact of relay 14 to ground and thebrush rod 15 is moved upwardly, carrying with it brush sets 16 and a setof commutator brushes 17. During this movement, the brushes are movedinto a position wherein one of the five sets of brushes 16 carried byrod 15 may be tripped.

When the district counting relay to ground.

. When sequence switch 100 leaves position 21}, relay 9 is deenergized,but relay 11 is maintained" energized over a circuit from groundedbattery, contact 106,. conductor 19, commutator 20, brush 21, right-handarmatureand front contact of relay 11, winding of relay 11, conductor12,contact 204, outer armature and back contact 0 counting relay to ground.The deenergization of relay 9 completes a circuit from grounded battery,armature and back contact of relay9, right-hand armatures and backcontacts of counting relays Nos. 1 and 3, right-hand armature and frontcontact of counting relay No. 5, winding of counting relay No. .4, toground. g

When commutator brush 22 engages a conducting portion of commutator 23,which will occurat the same'time that brush 21 moves onto an insulatingsegment of commutator 20, relay 9 will again be energized over a pathfrom grounded battery, winding of relay 9, contact 203, conductor 10,contact 107, conducting segment of commutator 23, brush 22, right-handarmature and front contact of relay 11, winding of relay 11, con ductor'12, contact 204, outer armature and back contact of the 0 counting relayto ground. The energization of-relay 9 completes a circuit from groundedbattery, armature and'front contact of relay 9, right-hand armatures'andback contacts of counting relays Nos. 0 and '2, right-hand armature and.

front contact of counting relay No.4, Winding of counting relay No. 3,to ground. Counting relayNo. 3 is energized in this, circuit.

.When brush 21 engages the second conducting segment of commutator 20,stepping relay 9 will be deenergized, relay 11 remaining energized overa path to grounded'battery through contact 106 as previously traced. Thesecond deenergization of relay 9 results in the completion of a circuitfrom grounded battery, armature and-back contact'of relay 9,right-handarmature and back contact of the N o. 1 counting relay,right-hand armature and front contact of the No. 3. counting relay,winding Ofthe No. 2 counting relay to ground. TheNo. 2 counting relay isenerg'ized in this circuit.

When brush 21 engages the secondinsulating segment of commutator 20, atwhich time brush 22 will engage the second conducting segment ofcommutator, 23, relay i 9 will be energized as before, and a circuitwill be completed from grounded battery, right-hand armature and backcontact of the No. 0, counting relay, ,righbhand'armature and frontcontact of the No. 2 counting're lay, Winding of the No.1 counting'relay tO ground; 7 a

When brush 21 .engages the third conduct. ing segmentof Connemara),stepping re? lay 9 will again be 'de'e'ner'gized, completing a circuitfrom grounded battery, armature and back contactof1'elay 9;; right-liandar mature and fronteontact'of tli'e'No. 1-c0iint f ing relay,-contac't"207,contact 301, conductor 24, Winding of the" 0 countingrelay'to ground. V The cnergization of the O counting 'i'elay interruptsthe circuit of "relay 11,*and this relay deenergizesfi Relay 14Wvill,however,

I be maintained energized over a; circui"tfrom grounded battery,Windingof relay 14, con

ductor'25, br us h 26,- conducting portionof commutator 27, conductor28, right-hand ar-" mature and front commend-f frelay14 to ground, untilthebrnsh 26 pngagesan in'snlating' portion of commutator 27. When thisoccurs relay 14'wi11 cleenergiZe ,o pening at its left-hand armature thecircuit fore drive magnet 18. Upon thedeenei'gi'zation of magnet 18, thebrush rod 15 comes to rest with the fifth brush set in a position to betripped. The action of brush26 over commutator 27 prevents the brushrod; from coming to rest beforethe brusnsetshave been accuratelypositioned. Each of the counting'relays when energized locks itself togrounded battery tliroilgh contact 208, throughits left-hand armatureand remains energized until sequenceswaeh 200 leaves position 2. V

When the 0 counting relay was energized, a circuit was completed fromgrounded battery, power magnet of sequence switch. 200,. contact 209,outer armature and front con tact of the O" counting relay to ground,for moving sequence stvitc'h200 outof'position 2 and into position 4.

When relay 14 de'e'nergizes a circuit is completed from groundedbattery, poyv'e'r' magnet of sequence sttitclflOO, contact 108',left-hand armature and back contact relay 14, to ground, for movingsequence switch 100 out of position 3 and into scsinen At thistimesequence switch 200 is in :po sition 4,- sequerice-sWitchlOO is" alsoinp0:- sition 4, and brush22 is engaging the lower mos't conductingsegment of commutator-29 A circuit will then be completed fi-Q'I ngrounded battery, winding of stepping relay 9, coritact203, conductor10,1COntact103, Winding of relay 11', conduct0r12, contact 204, outerarmature and back 'contacfiof the 0 counting relay to ground. Relays 9and" 11 are energized in this circuit.

Relay 11 again. completes energizin circuit for relay 14 from grounded.battery, Winding of relay 14, left-hand armature and front contactofr'elay 11 toground. Relay 14 is energized and completes a circuit fromgrounded battery, power ma net of sequence switch 100, contact 104,left-hand'armature and front contact of relay 14 to ground, for

moving sequence switch 100 out of position 4 and into position 5.

' Relay 9-"u'poi1 energiz'ation completed a circuit from groundedbattery,- armature and front contact of relay 9,right-hand armature andback-contact of" counting relays' ture and front contact of rela 11Windin y C off'relay 11, conductor 12,-contact 204, outer armature andback contact of the 0 counting relay to ground.

'lVhile sequence switch 100 is passing through positions 4 to 5, acircuit is completed from grounded battery, Winding of tripping magnet34, contact 111 to ground. The "energiz ation i of tripping magnet 31operates a trip rod 32 to release tlie'fifthset of brushes.

When sequence switch 100 arrives inposition 5, a circuit Will becompleted from grounded battery, winding of up-drive magnet 18,contactl05, armature and front contact of relay 14 to ground. Tliebr'ushrod is now moved upwardly in its group selectmg movement. i

When stepping relay 9 was deenergized, as a result of sequence suitchlOO leaving p0si= tion 43;, a circuit was completed from groundedbattery, armature and back contactof the relay 9, right-handarmatureandfrontfcontact of the No. 1 counting relay, contact 212, contact 213,conductor33, Winding of the No. 0 counting relay to ground. Countingrelay No. 0 is energized and locks up as described.

When brush22 engages the first insulating segment of commutator 29;which will occur simultaneously ivith the engagement of brush 21 withthe first long con-ducting segment of commutator 20, stepping relay 9Will againbe energiz'e'd over a circuit from grounded battery, Windingof stepping relay 9, contact 203, conductor 10, contact 110, conductor19, commutator '20, brush 21, righth'and armature and front contacto'it'relay 11, Winding of relay11, conductorll12, contact 204, outerarmature and back contact ofthe O" counting relay to ground.

The energization of stepping relay 9 coin plet'es a; circuit from.grounded battery, armaturc'and front contactof relay 9, right handarmature and frontcontactof counting relay' No. 0, Windingof the 0counting relay to ground. Counting relay is energized and locks itselfto grounded battery through contact 208. 7

Upon energization the 0 counting relay breaks at its outer armature andback. contact the holding circuit of relays 9land1l,

since brush 22 isat this time engaging an insulating segment ofcommutator 29. t

-Relay 11 at itsleft-hand armature breaks one branch of the energizingcircuit of relay 14, but relay 14; is maintained energized over alocking circuit. from grounded. battery, winding of relay 14c, conductor25, brush 26,- conducting portion of commutator 27,00 11- ductor,.28,.right-hand armature and front contactof the relayltto ground, untilbrush26 engages aninsulating portion of. commutator 27, which will occuruponthe completion of the second group stop. -Relay li will thendeenergize, opening at its lefthand armature the circuit of Lip-drivemagnet 18.

Thede'e'nergization of magnet 18 allows the brush rod 15 to bebroughttorest with the proper set of brushes accurately positioned belowthe second group of terminals served.

byita v The deenergization of relay 14 also coinpletes a I circuithfromgrounded battery, power magnet of sequence switch 100, contact 108,left-hand armature and back con tactof relay 14:, to ground, formovingsequence switch 100 out of position 5 and into position 11. y

The energlz ation of the 0 counting relay also completed a circuit fromgrounded battery,ypower magnet of sequence. switch 200,

contact 209, outer armature and front con tact of the 0 counting relayto ground, for

moving sequence switch 200 out of position,

4; and into position 6.

It is to be understood that trunk hunting occurs insome position ofsequenceswitch 100 between 5 and 11, and upon completion of the huntingmovement sequence switch 100 ismoved into position 11. Sincethis is awell-known operation, it has not. been considered necessary to discloseit in the present description. 7

' With sendersequence switch 200 in position 6, and district sequenceswitch 100 in position 11, the fundamental circuit is completed toasucceeding switch through contacts112,j113 and brushes 50 and51. The

operation of the sender in settingthesuo ceeding switches is similar tothat described and need not be described further. When the last set ofimpulses has been sent, sequence switch 200 ,is moved out of itslastsending position upon the energization of the 0 counting relay, and ismoved into its firstor normal position.

Upon arriving in its normal position, a circuit is completed fromgrounded battery,

power magnet of sequence switch 100, con. tact llet, conduc r 36, c ntat 2% t g oun for moving sequence switch 100out of position 11 andintoposition 16, which is the talking position. i 7

Upon the completion of conversation the operatoris informed by thelighting of wellknown supervisory signals (not shown), that connectionis no longer desired, and she removes plug 2 from jack 1, whereuponrelay 3 is deenergized,completing a circuit from. grounded battery,power magnet of sequence switch 100, contact. 115, armature and backcontact of relay 3, to ground, for moving sequence switch 100 out ofposition 16- and into position 18.

in position 18 of sequence winding; of power magnetv 37, contact 116, toground. Thebrush rod 15 isrestoredto normalpo'sition under thecontrol ofmagnet 37, and upon reaching its normal position a circuit is completedfrom groundedlbat actuating circuits therefor, variably] oper-l ablecontrolling contacts, andmeans to .actuatesaidcounting device, to anextentdeter= mined in part by certainones of said controlling contactsand determined in part by others of said controlling contacts inaccordash 100,21.- circuit is completed from grounded battery,

position 18 into ance with whether the number to be counted is odd oreven.

2. In a sending system, an impulse counting device, actuating circuitstherefor, variab y operable controlling contacts, and means to actuatesaid counting, device .to an extent determined in partby certain ones ofsaid controlling contacts'andin part by others of said controllingcontacts in accordance with whether the number of 111 pulses to becounted is odd or even. i 1 t 3. In a telephone exchange system anautomatic switch, a sending. device for con-- trolling, the operation ofsaid switch, said sending device including a. counting. device and a.relay to control the action of said counting device, and means toenergize said relay only, during alternate steps of said switch. 1 Y

4. In .a telephone exchange system, an automatic switch, a sendingdevice forcontrollingthe operation of said switch, said sending deviceincluding a plurality of counting relaysand' a stepping relay to controlthe successive actuation of said relays, and means to energize saidstepping relay only during alternate steps of said switch.

5 In an automatic tel phone-{exchange system, a sender arranged totransmit a plurality of sets of impulses, a controlling switch therefor,means to cause said sender to transmit a set of impulses in Various onesof the successive positions of said controlling switch, said senderincluding a counting device, actuating circuits therefor, variablyoperable controlling contacts, and means to actuate said counting deviceto an extent determined in part by certain ones of said controllingcontacts and determined in part by others of said controlling contactsin accordance with whether the number of impulses to be counted is oddor even.

6. In a telephone exchange system, an automatic switch, a sending devicefor controlling the operation of said switch, said sending deviceincluding a counting device, actuatlng circuits therefor, variablyoperable controlling contacts and means to actuate said counting deviceto an extent determined in part by certain ones of said contacts anddetermined in part by others of said contacts in accordance with whetherthe number of impulses to be counted is odd 7 or even, a relay tocontrol the actuation of sald countlng device, and means to energizesaid relay only during alternate steps of said switch.

7. In a sending system, a plurality of counting relays, actuatingcircuits therefor, variably operable controlling contacts, and means tosuccessively actuate said counting relays, the number of relays actuatedbeing determined in part by certain ones of said controlling contactsand determined in part by others of said controlling contacts inaccordance with whether the number of impulses to be sent is odd oreven.

8. In a sending system, a register, con tacts controlled thereby, aplurality of counting relays, means to successively actuate certain onesof said relays, the number of relays actuated being determined in partby the condition of certain ones of said register controlled contactsand in part by the condition of others of said register controlledcontacts, in accordance with whether the number of impulses to becounted is odd or even.

In witness whereof, I hereunto subscribe my name this 28th day of Dec.,A. D. 1916.

WARREN w. CARPENTER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. G."

